mx.js-luoxia.com has no CNAME records.
Question and response
Question
dig mx.js-luoxia.com. NS
Answer
The response has no answer records.
Authority
js-luoxia.com. 3489 SOA dns.js-luoxia.com. hostmaster.js-luoxia.com. 1852355180 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0